Fix Darwin stringy bits

Author: grynspan

Sources/Overlays/_Testing_CoreGraphics/Attachments/AttachableImageFormat+UTType.swift

@@ -113,12 +113,16 @@ extension AttachableImageFormat.Kind: CustomStringConvertible, CustomDebugString
   }
 
   package var description: String {
-    contentType.localizedDescription
+    let contentType = contentType
+    return contentType.localizedDescription ?? contentType.identifier
   }
 
   package var debugDescription: String {
     let contentType = contentType
-    return "\(contentType.localizedDescription) (\(contentType.identifier))"
+    if let localizedDescription = contentType.localizedDescription {
+      return "\(localizedDescription) (\(contentType.identifier))"
+    }
+    return contentType.identifier
   }
 }
 #endif

Tests/TestingTests/AttachmentTests.swift

@@ -874,8 +874,8 @@ extension AttachmentTests {
     @Test func imageFormatStringification() {
       let format: AttachableImageFormat = AttachableImageFormat.png
 #if canImport(CoreGraphics) && canImport(_Testing_CoreGraphics)
-      #expect(String(describing: format) == UTType.png.localizedDescription)
-      #expect(String(reflecting: format) == "\(UTType.png.localizedDescription) (\(UTType.png.identifier))")
+      #expect(String(describing: format) == UTType.png.localizedDescription!)
+      #expect(String(reflecting: format) == "\(UTType.png.localizedDescription!) (\(UTType.png.identifier)) at quality 1.0")
 #elseif canImport(WinSDK) && canImport(_Testing_WinSDK)
       #expect(String(describing: format) == "PNG format")
       #expect(String(reflecting: format) == "PNG format (27949969-876a-41d7-9447-568f6a35a4dc) at quality 1.0")
@@ -886,8 +886,8 @@ extension AttachmentTests {
     @Test func imageFormatStringificationWithQuality() {
       let format: AttachableImageFormat = AttachableImageFormat.jpeg(withEncodingQuality: 0.5)
 #if canImport(CoreGraphics) && canImport(_Testing_CoreGraphics)
-      #expect(String(describing: format) == "\(UTType.jpeg.localizedDescription) at 50% quality")
-      #expect(String(reflecting: format) == "\(UTType.jpeg.localizedDescription) (\(UTType.jpeg.identifier)) at quality 0.5")
+      #expect(String(describing: format) == "\(UTType.jpeg.localizedDescription!) at 50% quality")
+      #expect(String(reflecting: format) == "\(UTType.jpeg.localizedDescription!) (\(UTType.jpeg.identifier)) at quality 0.5")
 #elseif canImport(WinSDK) && canImport(_Testing_WinSDK)
       #expect(String(describing: format) == "JPEG format at 50% quality")
       #expect(String(reflecting: format) == "JPEG format (1a34f5c1-4a5a-46dc-b644-1f4567e7a676) at quality 0.5")